Thanks Jim. Since the transmission would have to be removed to change the ring gear, what else about the transmission should one get replaced (seals, gaskets, etc., or other components). Mine is an automatic, 4-cylinder. Is the timing chain/tensioner anyway linked to this job, because the mechanic also said that the timing chain tensioner needs replacement, as it doesn't hold oil, so the lifters are noisy if it has been standing overnite? What about the starter - should I get that touched at all?
Again, would appreciate any responses from anyone with similar experiences.